Search results
Results from the WOW.Com Content Network
Used for link-local addresses [5] between two hosts on a single link when no IP address is otherwise specified, such as would have normally been retrieved from a DHCP server 172.16.0.0/12 172.16.0.0–172.31.255.255
Besides the use by operating systems internally, other uses have been attributed to the address. [5] [6] A non-routable meta-address used to designate an invalid, unknown or non applicable target; The address a host assigns to itself when address request via DHCP has failed, provided the host's IP stack supports this.
A public IP address is a globally routable unicast IP address, meaning that the address is not an address reserved for use in private networks, such as those reserved by RFC 1918, or the various IPv6 address formats of local scope or site-local scope, for example for link-local addressing. Public IP addresses may be used for communication ...
Link-local addresses may be assigned manually by an administrator or by automatic operating system procedures. In Internet Protocol (IP) networks, they are assigned most often using stateless address autoconfiguration, a process that often uses a stochastic process to select the value of link-local addresses, assigning a pseudo-random address that is different for each session.
Both the IPv4 and the IPv6 specifications define private IP address ranges. [1] [2] Most Internet service providers (ISPs) allocate only a single publicly routable IPv4 address to each residential customer, but many homes have more than one computer, smartphone, or other Internet-connected device.
For IPv4, no black hole address is explicitly defined, however the reserved IP addresses can help achieve a similar effect. For example, 198.51.100.0 / 24 is reserved for use in documentation and examples [ 2 ] ; while the RFC advises that the addresses in this range are not routed, this is not a requirement.
A unique local address (ULA) is an Internet Protocol version 6 (IPv6) address in the address range fc00:: / 7. [1] These addresses are non-globally reachable [ 2 ] (routable only within the scope of private networks, but not the global IPv6 Internet).
For example, port 443 connects through a socket to the web server software and port 465 to a mail server's SMTP daemon. [7] The IP address of a public server is also important, similar in global uniqueness to a postal address or telephone number. Both IP address and port number must be correctly known by all hosts wishing to successfully ...